[c-nsp] how to validate cell rates?

[MADMAN]

Gert Doering wrote:

> Hi,
> 
> On Thu, Jan 20, 2005 at 10:29:30AM -0600, MADMAN wrote:
> 
>>  Try shaping down a little more, roughly 10%.  I do know that earlier 
>>IOS did not always take into account the overhead in the ATM cell when 
>>shaping.  I have seen this several times in the past though admittedly 
>>not in 12.3.
> 
> 
> The values listed for cells/seconds in "show atm vc <name>" are 
> correctly calculated for 53 bytes/cell (full size).  Like this:
> 
> Cisco-M-XIV>sh atm vc sp1-936
> ATM2/0.129: VCD: 46, VPI: 15, VCI: 129, Connection Name: sp1-936
> UBR, PeakRate: 2150 (5071 cps)
>                      ^^^^
> (PVC configured to "ubr 2150" instead of the 'documented' value of 
> "ubr 2303", so that the customers won't suffer while we argue with 
> the Telco)
> 
> So are you telling me that earlier IOSes sometimes used 48 bytes for
> calculating cells/s., or that the displayed values are wrong?
> 
> gert

   In a nutshell, yes to your first question.  A couple of us here had a 
couple a cases open but could never got anywhere.  knowing how to 
resolve the problem and realizing we were not loosing any bandwidth it 
wasn't worth battling.

   Dave

-- 
David Madland
CCIE# 2016
Sr. Network Engineer
Qwest Communications
612-664-3367

"Emotion should reflect reason not guide it"